<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddDialog">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开页 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['vcenter', 'bdbottom', index1 === 0 ? 'bdtop' : '']"
              v-for="(item1, index1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[index2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, index2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级标签 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引页 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <el-form
        :model="addForm"
        :rules="formRules"
        ref="addFormRef"
        label-width="90px"
      >
        <el-form-item label="角色ID" prop="roleId">
          <!-- id随便输入，服务器会重新分配 -->
          <el-input v-model="addForm.roleId"></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClose"
    >
      <el-form
        :model="editForm"
        :rules="formRules"
        ref="editFormRef"
        label-width="90px"
      >
        <el-form-item label="角色ID">
          <el-input v-model="editForm.roleId" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClose"
    >
      <!-- 树形结构区域 -->
      <el-tree 
      :data="rightsList" 
      :props="treeProps" 
      show-checkbox 
      node-key="id" 
      default-expand-all
      :default-checked-keys="defKeys"
      ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      addDialogVisible: false,
      //添加角色表单
      addForm: {
        roleId: "",
        roleName: "",
        roleDesc: ""
      },
      //添加角色表单验证
      formRules: {
        roleId: [{ required: true, message: "请输入角色ID", trigger: "blur" }],
        roleName: [
          { required: true, message: "请输入角色名", trigger: "blur" }
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" }
        ]
      },
      //修改角色
      editForm: {},
      editDialogVisible: false,
      setRightDialogVisible: false,
      //所有权限
      rightsList: [],
      //属性控件的属性绑定的对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中节点的ID数组值
      defKeys: [],
      //当前即将分配权限的角色id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");

      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolesList = res.data;
      //   console.log(res.data);
    },
    //显示添加角色对话框
    showAddDialog() {
      this.addDialogVisible = true;
    },
    //添加角色对话框关闭时
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },
    //添加角色
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        //发起添加请求
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败");
        }
        this.$message.success("添加角色成功");
        this.addDialogVisible = false;
        this.getRolesList();
      });
      console.log(this.addForm);
    },
    //打开编辑角色对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户失败");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //验证修改并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;
        //发送修改后角色信息
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.roleId,
          { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("更新用户信息失败");
        }
        this.editDialogVisible = false;
        this.getRolesList();
      });
    },
    //根据id删除角色
    async removeRoleById(id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败");
      }
      this.$message.success("删除用户成功");
      this.getRolesList();
    },
    //监听编辑对话框关闭
    editDialogClose() {
      this.$refs.editFormRef.resetFields();
    },
    //根据id删除权限
    async removeRightById(role, rightId) {
      //弹框提示确认删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      //发送删除请求
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      this.$message.success("删除权限成功");
      role.children = res.data;
    },
    //打开分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      const {data:res} = await this.$http.get('rights/tree');
      if(res.meta.status !== 200){
        return this.$message.error('获取权限失败');
      }
      this.rightsList = res.data;
      
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true;
    },
    //通过递归的方式获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node,arr) {
      //如果role不包含children属性，则为三级节点
      if(!node.children){
        return arr.push(node.id);
      }
      node.children.forEach(item => {
        this.getLeafKeys(item,arr);
      })
    },
    //监听分配属性对话框关闭
    setRightDialogClose() {
      this.defKeys = [];
    },
    //点击分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',');

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr});
      if(res.meta.status !== 200) {
        return this.$message.error('添加授权失败');
      }
      this.$message.success('添加授权成功');
      this.getRolesList();
      this.setRightDialogVisible = false;

      }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
// 纵向居中对齐
.vcenter {
  display: flex;
  align-items: center;
}
</style>